KR19980019310A - Supply fuel control device for car - Google Patents

Abstract

This program aims to propose fuel saving, stable operation and engine protection when driving off the accelerator pedal with thrust and driving inertia. The program for controlling fuel oil discharged through the fuel injection device 1 attached to each cylinder is provided. In an internal combustion engine equipped with an ECU (2) stored and controlled in a ROM (3), a selection switch for inputting a program for fuel supply control to the ROM (3), and for operating the fuel supply control device (a). (4) and the accelerator pedal side switch (5) which is turned off when the accelerator pedal is pressed, and is turned on when the pedal is fully released (5) and the transmission which is turned on when the transmission gear is connected to the engine output shaft and turned off when the gear is dropped from the engine output shaft. The switch 6 is provided at the same time, and the selection switch 4, the accelerator pedal side switch 5 and the transmission side switch 6 are electrically connected to the ECU 2 and the key power supply 7, The fuel supply control for automobiles configured to operate the fuel supply control device (a) only when the state in which these switches are all turned ON and the signal is transmitted to the relay (9) by the ROM (3) are turned off. Device.

Description

Automotive fuel supply control device

The present invention relates to a fuel supply control device for an automobile, and in detail, when the engine output shaft and the transmission gear are driven in a state of being released from the accelerator pedal, the fuel supplied to the fuel injection nozzles attached to each cylinder is automatically supplied. The present invention relates to a fuel supply device for automobiles, which is capable of saving fuel by recovering the fuel destined for the fuel injection device after being shut off at the same time.

If you have ever experienced driving, you may have thought about fuel-saving driving at least once. For example, to go downhill, to stop, or to slow down while driving. Under these driving conditions, even if the engine power is reduced, the car can be driven to the desired place. This slow driving speed is not enough to waste speed and waste the engine as well as the engine. Knowing this, in practice, this fuel consumption is never ending.

But when driving downhill, driving inertia with the gear in neutral is dangerous and never saves fuel. However, in the case of motor vehicles driving on highways, motorways, and general roads, especially in overloading vehicles, there is a common case of dangerous inertial operation, which does not save fuel, but rather excessive brake system. Operation can cause malfunction or inoperability of the brake system, increasing the likelihood that an unexpected traffic accident will be triggered. Therefore, fuel-saving efforts are important, but inertia should never be controlled. And excessive consumption of fuel is also a huge economic disadvantage.

Therefore, in the future, it is thought that special measures for fuel reduction, pollution reduction, and engine protection are urgently needed for future engines for automobiles.

As a result of earnestly examining to meet these expectations, the present inventors have come to propose the present invention after seeing the completion of a fuel supply device having a great fuel saving effect even while the engine output is continued in the internal combustion engine.

The main feature of the present invention is that when the engine pedal and the transmission gear are released from the accelerator pedal in a state in which the engine output shaft and the transmission gear are energized, the current flowing from the fuel tank to the fuel injection device is cut off and at the same time the supply of fuel is stopped, and the flow to the fuel injection device is As the fuel is shut off, the fuel in the fuel passage before the fuel injection system is returned to the fuel tank through the existing bypass passage, which prevents unnecessary fuel consumption and saves fuel. Although the vehicle decelerates due to inertia, the vehicle continues to run, and if the pedal is shifted to the neutral or in the case of automatic transmission, the fuel supply is immediately restarted and the engine is operated normally when the shift lever is moved to neutral. To provide a fuel supply control device for.

1 is a configuration diagram of a fuel supply control device suitable for an automatic transmission-mounted vehicle as an internal combustion engine equipped with an electronically controlled fuel supply device.

2 is a configuration diagram of a fuel supply control device suitable for a manual transmission vehicle equipped with an electronically controlled fuel supply device-mounted internal combustion engine.

Explanation of symbols for the main parts of the drawings

1: Fuel supply device 2: E.C.U

3: ROM 4: Selection switch

5: accelerator pedal side switch 6; Transmission side switch

7 key power 8 clutch side switch

9: relay

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings made in accordance with a preferred embodiment.

The fuel supply control apparatus for automobiles of the present invention differs in embodiments according to the shift method. Among the fuel injection methods, there are an electronically controlled type, and as the shift method, there are a manual shift and an automatic shift method, and the fuel injection method and the shift method are generally used together or mixed. The following description focuses on a fuel supply control device that is particularly suitable for each type of shift of an internal combustion engine. The fuel supply control apparatus of the present invention has the following points in common, regardless of the type of shift mode. First, the fuel supply control device must be electrically connected to the power supply and the fuel supply control device. Second, the transmission gear must be electrically connected to the engine output shaft while driving. Third, the fuel pedal must be removed from the accelerator pedal. do. If any of these are missing, the fuel supply control will not work. Therefore, safe operation is possible even in shortcut operation, abnormal operation and malfunction other than normal operation.

In an internal combustion engine having an electronically controlled fuel injection device 1, a method of controlling the current flowing through the fuel injection device 1 is most preferred. No special equipment is required. Then, as shown in FIG. 1, a program specially prepared for fuel supply control is input to the ROM 3 of the ECU 2 mounted in the past, and the selection switch 4 and the accelerator pedal for the operation of the fuel supply control device a are operated. Press the accelerator pedal side switch (5), which is turned OFF when the pedal is pressed, and is turned ON when the pedal is released completely.The transmission side switch (6) which is turned ON when the transmission gear is connected to the engine output shaft dynamically and turns OFF when the transmission gear falls from the engine output shaft, At the same time, the selector switch 4, the accelerator pedal side switch 5 and the transmission side switch 6 are electrically connected to the ECU 2 and the key power supply 7, and both of these switches are turned on together. The fuel supply control device (a) of the present invention is configured to operate normally only when the situation is identified and the signal is sent to the relay 9 by the ROM 3 to turn off the circuit.

However, in the case of a vehicle equipped with a manual transmission, in addition to the above, as shown in FIG. 2, a clutch side switch 8 that is turned off when the clutch pedal is pressed and immediately turned on when the foot is released is added. This is because the engine does not turn off when the ON / OFF operation is momentarily performed within the clearance range of the clutch pedal before the power transmitted to the transmission gear is cut off.

In addition, when the running speed falls below the prescribed speed input thereto, the ROM 3 is loaded even if the selection switch 4, the accelerator pedal side switch 5 and the transmission side switch 6 are in the ON state. A priority circuit program is input to turn on the relay 9 to prevent the engine from stopping or interrupting the power of the electric system.

In addition, in the ROM 3, for example, when the speed exceeds 100 Km, the temporary stop of supply of the fuel in the fuel supply device 1 may be adjusted sequentially or selectively. Needless to say that such modification is also within the technical scope of the present invention, it helps to prevent overspeed and to keep the economic speed.

Next, the correct use method of the present invention configured as described above is as follows. It is convenient to leave the selector switch 4 in advance prior to driving. When driving down a highway, driving road, or on a normal road, when you need to increase your speed in order to secure a safe distance from a vehicle that has suddenly run, when you want to slow down in front of a toll gate, When slow motion is required due to a signal or a pedestrian signal, the accelerator pedal side switch 5 is turned on the moment the foot is released from the accelerator pedal. Since the transmission side switch 6 is already ON when the vehicle is traveling, there is no need to operate this switch separately.

Then, the key power supply 7, the selector switch 4, the accelerator pedal switch 5, and the transmission side switch 6 are all in an ON state, and the ROM 3 senses the relay 9 to operate. The relay 9 is immediately turned off to cut off the current destined for each fuel supply device 1, whereby the supply of fuel is stopped. However, cars and engines continue to move and move by the thrust and driving inertia, even when the fuel supply is interrupted. In this state, even when the fuel supply is not made, the car travels, thus saving fuel as much as its mileage.

When the traveling speed falls below the specified speed input to the ROM 3, the ROM 3 takes precedence even if the selector switch 4, the accelerator pedal side switch 5 and the transmission side switch 6 are in the ON state. Since the fuel supply is restarted immediately by turning on the relay 9 by the circuit, the engine continues to operate with the power of the fuel and the electric system moves as it is.

According to the present invention as described above, when the engine pedal and the transmission gear are released from the accelerator pedal in a state in which the engine output shaft and the transmission gear are dynamically connected, the current flowing from the fuel tank to the fuel injection device is cut off, the supply of fuel is also stopped, and fuel is supplied to the fuel injection device. As it is stopped, the fuel in the fuel passage before the fuel injector is returned to the entire fuel tank to save fuel by avoiding unnecessary fuel consumption, while the vehicle continues to decelerate due to the rotational inertia and thrust of the wheels. It is possible to drive, and if you press the accelerator pedal or clutch pedal again, or move the shift lever to neutral in the case of an automatic transmission, the engine and the engine will operate normally as soon as the fuel injection device resumes supply of current and fuel. .

In addition, since the motor side is always connected to the engine dynamically, it is safe because there is no risk like inertial operation in the state of neutral gear.

Claims (4)

In an internal combustion engine equipped with an E.C.U (2) for controlling and storing fuel oils discharged through a fuel injection device (1) attached to each cylinder in a ROM (3), The accelerator pedal is turned on when the program for fuel supply control is input to the ROM 3, and when the accelerator switch is pressed down with the selection switch 4 for operating the fuel supply control device a, and when the foot is completely released from the accelerator pedal. And a side switch 5 and a transmission side switch 6 which is ON when the transmission gear is dynamically connected to the engine output shaft and is turned OFF when the transmission gear is dropped from the engine output shaft, wherein the selection switch 4 and the accelerator pedal side switch are provided. (5) and the transmission-side switch (6) are electrically connected to the ECU (2) and the key power supply (7), the situation that these switches are all turned on together, the ROM (3) relays the signal (9) A fuel supply control device for automobiles configured to operate the fuel supply control device (a) only when the circuit is turned off by sending the The fuel supply control device for a vehicle according to claim 1, wherein the fuel supply control device (a) is further provided with a clutch side switch (8) which is turned OFF when the clutch pedal is pressed and immediately turned on when the pedal pedal is released. 2. The ROM (3) according to claim 1, wherein the ROM (3) is set even if the selection switch (4), the accelerator pedal side switch (5), and the transmission side switch (6) are in an ON state when the running speed falls below a prescribed speed input thereto. A fuel supply control apparatus for a vehicle in which a priority circuit program is input to prevent the ROM (3) from turning on the relay (9) to stop the operation of the engine or cut off the power of the electric system. 4. The fuel supply control apparatus for a vehicle according to claim 3, wherein the ROM (3) has a program for continuously or selectively adjusting the supply stop action of the fuel in the fuel supply apparatus (1) when the specified speed is exceeded.